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Commitments, Contingent Liabilities and Other Matters - Large Power Projects in South Africa (Details) R in Millions, $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 30, 2018 USD ($) | Oct. 30, 2018 ZAR (R) | Dec. 31, 2018 USD ($) | Sep. 29, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jul. 01, 2017 USD ($) | Apr. 01, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Feb. 15, 2019 USD ($) | Feb. 15, 2019 ZAR (R)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  | $ (107.6) | $ (59.9) | $ (70.0) |  |
Revenues |  |  | $ (445.0) | $ (362.5) | $ (379.2) | $ (351.9) | $ (387.0) | $ (348.5) | $ (349.7) | $ (340.6) | (1,538.6) | (1,425.8) | (1,472.3) |  |
Increase in costs of products sold |  |  |  |  |  |  |  |  |  |  | 1,127.9 | 1,095.6 | 1,096.5 |  |
South Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | (72.7) | (56.9) | (105.4) |  |
Large Power Projects | South Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Claims and unapproved change orders |  |  | 37.9 |  |  |  |  |  |  |  | 37.9 |  |  |  |
Reportable and other operating segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  | (178.5) | (124.9) | (142.8) |  |
All Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | (98.6) | (93.8) | (138.4) |  |
All Other | Reportable and other operating segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  | 18.9 | 56.8 | $ 21.8 |  |
All Other | Reportable and other operating segments | Large Power Projects | Revisions in estimates for large power projects | South Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  | 29.9 |  | 22.9 |  | 4.7 | 52.8 |  |  |
Revenues |  |  | 23.4 |  |  |  | $ 23.4 |  | 13.5 |  | $ 2.7 | 36.9 |  |  |
Increase in costs of products sold |  |  | $ 6.5 |  |  |  |  |  | $ 9.4 |  |  | $ 15.9 |  |  |
DBT Technologies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation settlement awarded to subcontractor | $ 17.7 | R 256.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Large Power Projects | South Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible loss |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8.0 | R 116.7

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